*Ask a Guerrilla Air Tech*

I have a 48/45 that was one of the very first ones you guys made. It is still under factory hydro. It developed a crack in the clear coat, then a decent piece of the clear coat cracked off. Is that covered under any kind of warranty or am I just out of luck?

why would my g2 and mythII Regs,both be blowing birst discs ? replaced the disks on both regs and both have blown again . could this be due from lack of maintenance and needing to be lubed ? can I use Dow 33 ?

I have a 48/45 that was one of the very first ones you guys made. It is still under factory hydro. It developed a crack in the clear coat, then a decent piece of the clear coat cracked off. Is that covered under any kind of warranty or am I just out of luck?

why would my g2 and mythII Regs,both be blowing birst discs ? replaced the disks on both regs and both have blown again . could this be due from lack of maintenance and needing to be lubed ? can I use Dow 33 ?

You can replace burst disk all day and it will keep on blowing.

When the 1.8K Low side burst disk vents all the air out, this is an indication to service your regulator. A quick clean up of the internals and lube of the o-rings (dow 33 works) might fix your problem. Also, inspect the clear piston seal and make sure do do not see any cracks or scratches on there; if the clear seal is damage, then you need a rebuilt kit. See breakdown video below for reference.

In January I bought a new tank, originally I wanted a myth G2 reg but when I ordered it I was told that those regs were no longer being produced but the replacement (Rebel Reg) was just as good.

So I go ahead and order my new tank, got it filled at my local scuba shop and at 2am in the morning the next day the LP burst disk blew! Weird considering this was a brand new tank with a brand new reg on??

So anyway I ordered a replacement burst disk for the reg and at the same time ordered a LP assembly (I'm buying my mates victory soon so need a LP reg) Take my reg apart and find out that the LP assembly looks nothing like whats in the Rebel Reg

Now my question is am I able to simply swap over the springs and piston (the pistons are slightly different) or pehaps just the spring, and would this give me the LP I require or do I need to buy a completely new reg?

I have a gen 1 myth reg and on the bottom of the reg that little screw on the bottom, I believe it is called the seat retainer is beginning to show signs of green oxidation, however, there doesn't seem to be any problem. Is this something to be concerned about?
Also, the reg has not been lubed in some time(I don't even remember if it is supposed to have lube) Does this pose a problem?

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In January I bought a new tank, originally I wanted a myth G2 reg but when I ordered it I was told that those regs were no longer being produced but the replacement (Rebel Reg) was just as good.

So I go ahead and order my new tank, got it filled at my local scuba shop and at 2am in the morning the next day the LP burst disk blew! Weird considering this was a brand new tank with a brand new reg on??

So anyway I ordered a replacement burst disk for the reg and at the same time ordered a LP assembly (I'm buying my mates victory soon so need a LP reg) Take my reg apart and find out that the LP assembly looks nothing like whats in the Rebel Reg

Now my question is am I able to simply swap over the springs and piston (the pistons are slightly different) or pehaps just the spring, and would this give me the LP I require or do I need to buy a completely new reg?

First of all, we will be releasing the G2 again soon with a couple new improvements.

Second of all, the Rebel (we call it the M4.5 now) is a non adjustable regulator, this means the output pressure is only from 800-850 PSI and cannot be adjusted down.

The kits that Rap4UK sells are only for the G2 regulator and the older style Myths, not for the M4.5.

Unfortunately if you need a LP output regulator, you do need a newer regulator and our adjustable regulators are not ready just yet; working out a couple more kinks before we release the regs.

I will contact Rap4UK to make it clear on the kits, and compatibility.

As for the new M4.5 that had the burst disk go out, this can be from a couple factors. You had a dirty fill, somehow dirt or debris was introduced inside the regulator. The video above is based on the older style Myth reg, but the internals are the same except for the seat retainer, and the flush burst disk. Open up the regulator, and make sure to clean any dirt or debris inside. Inspect the piston and make sure the ball clear seal is not damage. If the ball seal is not damage, and your regulator is cleaned out, then you can add in a new burst disk.

Hey thanks a lot for clearing that up for me. It's a good thing you're contacting rap4uk also as there is no description on their site as to what regs those kits can be used with (plus I was under the impression that the Reg I was getting would also be adjustable )

I'll just have to part with £50 for a new reg, this new tank's just becoming more and more expensive

I have a gen 1 myth reg and on the bottom of the reg that little screw on the bottom, I believe it is called the seat retainer is beginning to show signs of green oxidation, however, there doesn't seem to be any problem. Is this something to be concerned about?
Also, the reg has not been lubed in some time(I don't even remember if it is supposed to have lube) Does this pose a problem?

Well right now it might not be an issue, it depends how severed it is. Two things can happen on the oxidized seat retainer.

The seat retainer might break apart slowly over time and the air flow will become more open; the output pressure will increase (pretty much your 1.8K burst disk will blow and you will need a new seat retainer).

The second scenario, there can be oxidation built up around the air passage, and it will reduce the airflow into the regulator; the output pressure will drop.

I do recommend you get a rebuilt kit to avoid these issues if it is severed, but if it is very minor, then you should not be having any problems anytime soon.

Hey thanks a lot for clearing that up for me. It's a good thing you're contacting rap4uk also as there is no description on their site as to what regs those kits can be used with (plus I was under the impression that the Reg I was getting would also be adjustable )

I'll just have to part with £50 for a new reg, this new tank's just becoming more and more expensive

hi - a query in regard to size of 2 o rings specifically - the one around the brass bit inside the reg bottom) and also the o ring around the thread that screws in to the bottle and seals between bottle and reg. The former is flattened out a bit and the latter is looking a bit squashed and in need of some love/replacement!

Have spare kits just want to make sure the correct size, particularly the one inside the reg sealing the bottle.

hi - a query in regard to size of 2 o rings specifically - the one around the brass bit inside the reg bottom) and also the o ring around the thread that screws in to the bottle and seals between bottle and reg. The former is flattened out a bit and the latter is looking a bit squashed and in need of some love/replacement!

Have spare kits just want to make sure.

thanks, Mark

You can use the same o-ring on both sides (flange & tank threads) 015-90 Polyurethane.

The bottom bottle tank o-ring can varied sometimes depending on the tank manufacture. For Example Carlton, Gayston will use 015-90 Polyurethane o-ring, while Luxfer, AMS would use 112-70 Buna.

But the standard tank o-ring we use on the G2 is a 112-70 Buna and on the flange is the 015-90 Polyurethane.